Steam-engine.



J. M. CLARK.

STEAM ENGINE.

APPLICATION FILED was. 1915.

Patefited Sept. 7, 1915.

JOHN M; CLARK, F WHITESTONE, NEW YORK.

swam-Enema.

Application filed January 6,1915. Serial No. 726.

To all whom it may concern Be it known that 1, JOHN M. CLARK '8i citizen of the United States, and residing at Whitestone, Queens county, New York, have invented certain new and useful Improvements in Steam-Engines, of which the following is a specification.

This invention relates to Steam engines and has particular reference to improvements on a steam engine patented by' me March 22, 1904, No. 755,453.

In my present invention I provide novel 1 improved valve mechanism by which I can deliver the motive fluid to' the valve chamber close up to the cylinder, so that a minimum loss through condensation only occurs, and I also provide improved-means for controlling the'action of the valves by which an early, quick cut-off is obtained, allowingof greater expansion of the steam behind the piston resulting in a higherpower develop-- ment.

My present invention also provides a ,structure'of the class described which posthereby obtaining-longer expansive action on the piston, as for lnstance if the cut-off is at one third of the stroke, the expansion continues for the balance of the stroke, thus providing a double acting engme nearly if not quite equal to a compound engine of the same bore and crank stroke.

My invention provides an engine in which the piston and cylinder move in opposite directions the same distance simultaneously;

thus if the crank stroke is six inches the piston head passes through twelve lnche's of cylinder, by which construction the high speed of the short stroke engine combined with the power and economy of the slow long stroke engine is obtained. 7

The invention further provides new and novel arrangements and construction of parts to be hereinafter described I and claimed. s

Specificati of ers Iatent. Patented @epft. T, IQIfi.

In the drawings forming part of this specification similar reference characters are employed to designate corresponding parts and in which, I

Figure 1,. is a sectional elevation of my improved engine, some of the supporting frame beingomitted. Fig. 2, is a view at being entirely removed.

In the drawings I"f "=have shown at a, the cylinder of the engine, and at b, the piston provided with the usual rod 0, connected to a cross hea d, movable in guides e, to which cross head 0?, is pivoted a pitman f connected to a crank g, of the engine shaft h. The cylinder at, is closed at the ends by the usual heads 2', and j, which have'tubular integral elbow extensions 7:, and Z, forming ports m and n, through which the-motive.

fluid passes during the operation 'of ,the engine. The cylinder heads 71 and j, are sea right angle to Fig. 1, looking in the direc-' tion of the arrowA, the supporting framecured in placeby bolts 0, extending-the 7 length of the cylinders and through theheadsto receive nuts as clearly showmand the-cylinder heads are provided with inte gral guide half blocks 7), to which an bolted cap blocks g, which form guides through which a fixed standard 1', passes to support and guide the. cylinder in its reciprocating operative movement.

' The bottom cylinder head 7', is provided.

with the usual stuifing-box s, and two pairs of spaced perforated lugs t, be tween which are pivotally-carried a pair of connecting rods or llIlkS u, havlng pivotal connection at their-lower ends to cranks v, and w, of

the engine shaft h, as shown.

Tubular castings X and Y bolted to' the extensions '70, and l, are provided with cen-' -tral bores and with lateral ports :22 and y Ill which register with the ports m, andn, and

these castings are also provided withflanged elbows m and 3, to which are bolted flanged exhaust pipe sections a, projecting into an exhaust cylinder 2 of greater diameter than the pipe sections. The vfree ends of the said pipe sections are spaced apart to form a free exhaust-space 2 to allow of free exit of the used motive fluid into the cylinder 2' and out through the port. 2 as will be readily understood. Threaded into the inin Fig. 1, of the drawings and said cylinder.

8, is provided with an inlet port 9, through which the steam is delivered from the boiler.

I provide effective means for controlling steam under high pressure and delivering 1t close up to the ends of the cylinder, conslsting of companion valves 10 secured to a rod 14, passing through the casting X,

tube 5, casting Y, and out through a stufiing box 12 thereon, and. it. will be understood the casting X, tube 5 and casting Y, collectively form a valve chamber 14, in which the steam is confined between the balanced companion valves 10, so that in the operation of the engine, thrust is greatly reduced.

The cylinders z and 8, are secured one to the other and both are secured against movement by a bracket 15, rising from the frame 16, of the engine. The lower free end of the valve rod 14, is pivotally connected to a link 17 which is in turn pivoted to a lever 18, having pivotal connection with one of the connecting rods or links M, and pivoted to this lever 18, is a rod 19, connected at its.

other end to an eccentric strap 20, carried on an eccentric disk 21, mounted on and secured .to the crank pin 22, of the crank 2,

of the engine shaft as shown in Fig. 2, of

the drawings.

The operation of my improved engine will be r'eadily understood by those skilled in the art to which it appertains and a detailed description thereof is not deemed necessary, the improvement being particularly constituted by the construction of the valves and valve chamber and the means for giving the valves quick cut-oif action.

Changes in the construction and arrange-' ment of parts may be made within the scope of the appended claims without departing from the spirit of the invention or sacrificing its advantages.

What I claim is 1. In an engine of the class described. a cylinder and a piston therein, said cylinder having heads formed with extensions provided with ports, castings bolted to said extensions and having ports registering with the ports in the extensions, said castings being provided with longitudinal bores, a tube having ports and being connected to the castings, the bore thereof registering with that of the castings to form a valve chamber,

a fixed steam cylinder of greater diameter than the tube and through which the tube is adapted to. slide, companion valves" slidable in the valve chamber, means for giving the cylinder and piston opposite movements and for operating the valves.

2. In an engine having a reciprocating cylinder and a piston therein, a valve chamber arranged alongside the cylinder and extending above and below the same and being provided with lateral ports, companion valves operating in said chamber to open and close the ports, a rod connecting the valves and extending downwardly through the end of the valve chamber and geared in connection with an eccentric on a crank pin of the engine shaft and means for giving the cylinder and piston opposite movements.

3. In a steam engine a cylinder having heads provided with tubular elbow extensions, a valve chamber carried by the extensions, valvesin said chamber to control ports opening into the chamber above and below the ends of the cylinder, a fixed steam inlet cylinder surrounding the valve chamber and in communication therewith and through which the valve chamber moves, means for operating the valves and for giving the cylinder and piston opposite movements for the purpose described.

4. In a steam engine, a cylinder and a piston therein, said cylinder being provided with tubular elbow extensions, a valve casing carried thereby and having ports registering with ports in the extensions, an inlet steam cylinder of greater diameter than the valve chamber and surrounding the same to provide a steam chamber in communication with the valve casing, elbow extensions at the top and bottom of the valve casing, exhaust pipe sections secured thereto, afixed exhaust cylinder of' greater diameter than the exhaust pipe sections and inclosing the free ends thereof to form an exhaust steam chamber through which the pipe sections move, valves in said casing to open and close the ports, means for operating the valves and for operating the cylinder and piston in opposite directions.

5. In an engine of the class described a cylinder and a piston therein, a valve casing at the side of the cylinder having ports communicating with the top and bottom thereof, an inlet steam cylinder surrounding the easing and communicating therewith, exhaust pipe sections carried by the valve casing, an exhaust steam cylinder of greater diameter than the exhaust pipe sections and inclosing the spaced free ends thereof to form an exhaust steam chamber, the said inlet and exhaust cylinders being connected one to the other and to the frame of the engine, a pair of valves in said casing, means for operating the valves and for giving the piston and cylinder of the engine opposite movements.

6. In a steam engine the combination with a reciprocating cylinder adapted to move in a direction opposite its piston, a valve casing carried by the cylinder, fixed steam inlet and outlet cylinderscommunicating therewith, and through the former of which the casing is adapted to move, companion valves 1,152,%88 iii in said; casing, means for giving the cylinder two subscribing Witnesses, this 5th day of and plston opposlte movements and means January, 1915.

carried by a crank pin of the engine shaft for giving the valves simultaneous recipr0 JOHN CLARK 5 eating movement. Witnesses:

In testimony whereof, I have signed my FRANK E. HORN,

name to this specification in the presence of GEO. H. REED. 

